男，45岁，肝炎后肝硬化5年，近日出现黄疸、血性腹水，最有意义的检查是（）

A.蛋白电泳

B.甲胎蛋白

C.血氨

D.胆红素

E.血红蛋白

In your project, you realize the importance of determining the start and finish dates for project activities. If the project start or end dates are not realistic, then the project may not be completed on time. This is done as part of （）.

A．activity sequencing

B．activity duration estimating

C．schedule development

D．activity definition